Method and apparatus for allocating and signaling ACK/NACK resources in a wireless communication system

Abstract

Methods and apparatus are provided for determining acknowledgement/negative acknowledgement (ACK/NACK) resources at a user equipment (UE) in a wireless communication system. Control information is received on a downlink control channel for data transmission and the control information is decoded. It is determined whether a scheduling type of a data channel for the data transmission is persistent or non-persistent based on the decoded downlink control information. A resource for transmission of an ACK/NACK is determined based on the determined scheduling type of the data channel.

What is claimed is: 
     
       1. A method performed by a user equipment in a wireless communication system, the method comprising:
 receiving, from a base station, data on a downlink data channel; 
 determining whether a scheduling type of the downlink data channel is persistent or non-persistent; and 
 transmitting, to the base station, acknowledgement/negative acknowledgement (ACK/NACK) information for the data, 
 wherein, when the scheduling type is non-persistent, the ACK/NACK information is transmitted on a first resource determined according to a downlink control channel corresponding to the data, and 
 wherein, when the scheduling type is persistent the ACK/NACK information for an initial persistent data transmission is transmitted on a second resource determined according to the downlink control channel, and 
 the ACK/NACK information for a following persistent data transmission is transmitted on a third resource determined by using resource information received via high-layer signaling. 
 
     
     
       2. The method of  claim 1 , wherein the first resource is further determined based on an index of a resource for the downlink control channel. 
     
     
       3. The method of  claim 1 , wherein the determination of the scheduling type is based on a part of control information on the downlink control channel. 
     
     
       4. The method of  claim 3 , wherein the control information includes resource allocation information for the data and modulation and coding scheme (MCS) information for the data. 
     
     
       5. A user equipment in a wireless communication system, the user equipment comprising:
 a transceiver; and 
 a controller configured to:
 receive, from a base station via the transceiver, data on a downlink data channel; 
 determine whether a scheduling type of the downlink data channel is persistent or non-persistent; and 
 transmit, to the base station via the transceiver, acknowledgement/negative acknowledgement (ACK/NACK) information for the data, 
 
 wherein, when the scheduling type is non-persistent, the ACK/NACK information is transmitted on a first resource determined according to a downlink control channel corresponding to the data, and 
 wherein, when the scheduling type is persistent, the ACK/NACK information for an initial persistent data transmission is transmitted on a second resource determined according to the downlink control channel, and the ACK/NACK information for a following persistent data transmission is transmitted on a third resource determined by using resource information received via high-layer signaling. 
 
     
     
       6. The user equipment of  claim 5 , wherein the first resource is further determined based on an index of a resource for the downlink control channel. 
     
     
       7. The user equipment of  claim 5 , wherein the determination of the scheduling type is based on a part of control information on the downlink control channel. 
     
     
       8. The user equipment of  claim 7 , wherein the control information includes resource allocation information for the data and modulation and coding scheme (MCS) information for the data. 
     
     
       9. A method performed by a base station in a wireless communication system, the method comprising:
 determining a scheduling type of a downlink data channel as either persistent or non-persistent; 
 transmitting, to a user equipment, data on the downlink data channel based on the determination; and 
 receiving, from the user equipment, acknowledgment/negative acknowledgment (ACK/NACK) information for the data, 
 wherein, when the scheduling type is non-persistent, the ACK/NACK information is received on a first a resource determined according to a downlink control channel, and 
 wherein, when the scheduling type is persistent, the ACK/NACK information for an initial persistent data transmission is received on a second resource determined according to the downlink control channel, and the ACK/NACK information for a following persistent data transmission is received on a third resource determined by using resource information transmitted via-a high-layer signaling. 
 
     
     
       10. The method of  claim 9 , wherein the first resource is further determined based on an index of a resource for the downlink control channel. 
     
     
       11. The method of  claim 9 , wherein the scheduling type is associated with a part of control information on the downlink control channel. 
     
     
       12. The method of  claim 11 , wherein the control information includes resource allocation information for the data and modulation and coding scheme (MCS) information for the data. 
     
     
       13. A base station in a wireless communication system, the base station comprising:
 a transceiver; and 
 a controller configured to:
 determine a scheduling type of a downlink data channel either persistent or non-persistent; 
 transmit, to a user equipment via the transceiver, data on the downlink data channel based on the determination; and 
 receive, from the user equipment via the transceiver, acknowledgement/negative acknowledgement (ACK/NACK) information for the data, 
 
 wherein, when the scheduling type is non-persistent, the ACK/NACK information is received on a first resource determined according to a downlink control channel, and wherein, when the scheduling type is persistent, the ACK/NACK information for an initial persistent data transmission is received on a second resource determined according to the downlink control channel, and the ACK/NACK information for a following persistent data transmission is received on a third resource determined by using resource information transmitted via high-layer signaling. 
 
     
     
       14. The base station of  claim 13 , wherein the first resource is further determined based on an index of a resource for the downlink control channel. 
     
     
       15. The base station of  claim 13 , wherein the scheduling type is associated with a part of control information on the downlink control channel. 
     
     
       16. The base station of  claim 15 , wherein the control information includes resource allocation information for data and modulation and coding scheme (MCS) information for the data.